Files
astrolabe/docs/architecture/visual-specimen.html
T
oleh 094e5f6e4e Add visual design language (IBM/Carbon-inspired) and schedule it as M1.5
Defines the visual contract before the design-application work, so M2+ build on settled tokens.

- docs/architecture/09-visual-design.md: principles + deliberate divergences (square chrome, free color/theming), token system (IBM Plex type, 8px spacing, role-based color, motion), component conventions, and a source-repo map for extending the research
- docs/architecture/visual-specimen.html: standalone kitchen-sink specimen with a live theme x accent switcher; doubles as the tokens.css sandbox
- IMPLEMENTATION-PLAN: new M1.5 'Visual design foundation' milestone, plus ground-rule/cross-cutting/reference wiring
- index links: 00-overview, CLAUDE.md, AGENTS.md (architecture playbook now 00-09)

Applying the design to the M1 surfaces is deferred to a separate session.
2026-06-05 00:25:11 +03:00

566 lines
29 KiB
HTML

<!doctype html>
<html lang="en" data-theme="light" data-accent="indigo">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Astrolabe · Visual Specimen</title>
<!--
Standalone design specimen for docs/architecture/09-visual-design.md.
NOT part of the app — a kitchen sink to eyeball the tokens and catch
technical bugs before porting values into styles/tokens.css.
Fonts: IBM Plex via CDN for preview convenience ONLY. Production self-hosts
via @fontsource (offline/PWA). If offline, system fallbacks kick in.
-->
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link
href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@300;400;600&display=swap"
rel="stylesheet"
/>
<style>
/* ============================================================
TOKENS — the design contract (docs/architecture/09)
============================================================ */
:root {
/* Type */
--font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
--font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
/* Spacing — 8px base unit (2/4 as sub-steps) */
--space-1: 2px;
--space-2: 4px;
--space-3: 8px;
--space-4: 12px;
--space-5: 16px;
--space-6: 24px;
--space-7: 32px;
--space-8: 48px;
--space-9: 64px;
/* Shape — square chrome */
--radius: 0px;
--border-width: 1px;
/* Motion — productive only */
--dur-fast: 70ms;
--dur-fast-2: 110ms;
--dur-moderate: 150ms;
--ease: cubic-bezier(0.2, 0, 0.38, 0.9);
/* Status (light defaults; overridden in dark) */
--support-error: #da1e28;
--support-success: #198038;
--support-warning: #f1c21b;
--support-info: #0043ce;
--on-status: #ffffff;
}
/* --- Neutral roles: LIGHT theme (Carbon gray ramp) --- */
[data-theme='light'] {
--bg: #ffffff;
--layer-01: #f4f4f4;
--layer-02: #e0e0e0;
--border: #e0e0e0;
--border-strong: #c6c6c6;
--text: #161616;
--text-secondary: #525252;
--text-placeholder: #a8a8a8;
}
/* --- Neutral roles: DARK theme --- */
[data-theme='dark'] {
--bg: #161616;
--layer-01: #262626;
--layer-02: #393939;
--border: #393939;
--border-strong: #525252;
--text: #f4f4f4;
--text-secondary: #a8a8a8;
--text-placeholder: #6f6f6f;
--support-error: #fa4d56;
--support-success: #42be65;
--support-warning: #f1c21b;
--support-info: #78a9ff;
--on-status: #161616;
}
/* --- Accent: the FREE, swappable layer (theme-aware) --- */
[data-accent='indigo'] { --accent: #5b54e6; --accent-hover: #4a43d6; --accent-contrast: #fff; }
[data-accent='teal'] { --accent: #0f766e; --accent-hover: #0c5f59; --accent-contrast: #fff; }
[data-accent='amber'] { --accent: #b45309; --accent-hover: #92400e; --accent-contrast: #fff; }
[data-accent='rose'] { --accent: #be123c; --accent-hover: #9f1239; --accent-contrast: #fff; }
/* Brighter accents on the dark canvas (compound selector wins on specificity) */
[data-theme='dark'][data-accent='indigo'] { --accent: #8b85f0; --accent-hover: #a29bf5; --accent-contrast: #161616; }
[data-theme='dark'][data-accent='teal'] { --accent: #2dd4bf; --accent-hover: #5eead4; --accent-contrast: #161616; }
[data-theme='dark'][data-accent='amber'] { --accent: #fbbf24; --accent-hover: #fcd34d; --accent-contrast: #161616; }
[data-theme='dark'][data-accent='rose'] { --accent: #fb7185; --accent-hover: #fda4af; --accent-contrast: #161616; }
:root { --focus: var(--accent); }
/* ============================================================
BASE
============================================================ */
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
font-family: var(--font-sans);
font-size: 14px;
line-height: 1.45;
color: var(--text);
background: var(--bg);
transition: background var(--dur-moderate) var(--ease), color var(--dur-moderate) var(--ease);
}
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.25; }
code, pre, .mono { font-family: var(--font-mono); }
a { color: var(--accent); }
/* Shared focus ring (accessibility — always visible on keyboard focus) */
:where(button, input, select, textarea, [tabindex], a):focus-visible {
outline: 2px solid var(--focus);
outline-offset: 2px;
}
/* ============================================================
CONTROL BAR
============================================================ */
.controls {
position: sticky; top: 0; z-index: 10;
display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-5);
padding: var(--space-4) var(--space-6);
background: var(--layer-01);
border-bottom: var(--border-width) solid var(--border);
}
.controls strong { font-size: 13px; }
.controls .group { display: flex; align-items: center; gap: var(--space-3); }
.controls label { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.04em; }
.seg { display: inline-flex; border: var(--border-width) solid var(--border-strong); }
.seg button {
font: inherit; font-size: 13px; cursor: pointer;
padding: var(--space-2) var(--space-4);
background: var(--bg); color: var(--text);
border: none; border-right: var(--border-width) solid var(--border-strong);
}
.seg button:last-child { border-right: none; }
.seg button[aria-pressed='true'] { background: var(--accent); color: var(--accent-contrast); }
.swatch-btn { width: 22px; height: 22px; border: 2px solid transparent; cursor: pointer; padding: 0; }
.swatch-btn[aria-pressed='true'] { border-color: var(--text); }
/* ============================================================
LAYOUT
============================================================ */
main { max-width: 1080px; margin: 0 auto; padding: var(--space-8) var(--space-6) var(--space-9); }
section { margin-bottom: var(--space-9); }
section > h2 {
font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em;
color: var(--text-secondary); font-weight: 600;
padding-bottom: var(--space-3); margin-bottom: var(--space-6);
border-bottom: var(--border-width) solid var(--border);
}
.row { display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; }
.stack { display: flex; flex-direction: column; gap: var(--space-4); }
.muted { color: var(--text-secondary); }
.cap { font-size: 12px; color: var(--text-secondary); }
/* ----- Typography specimen ----- */
.type-row { display: flex; align-items: baseline; gap: var(--space-5); padding: var(--space-2) 0; }
.type-row .tag { width: 120px; flex: 0 0 120px; font-family: var(--font-mono); font-size: 12px; color: var(--text-secondary); }
.t-display { font-size: 42px; font-weight: 300; line-height: 1.15; }
.t-h1 { font-size: 32px; }
.t-h2 { font-size: 24px; }
.t-h3 { font-size: 20px; }
.t-h4 { font-size: 16px; }
.t-body { font-size: 14px; }
.t-caption { font-size: 12px; color: var(--text-secondary); }
.t-code { font-family: var(--font-mono); font-size: 13px; }
/* ----- Color swatches ----- */
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: var(--space-4); }
.swatch { border: var(--border-width) solid var(--border); }
.swatch .chip { height: 56px; }
.swatch .meta { padding: var(--space-3); background: var(--layer-01); font-size: 11px; }
.swatch .meta .name { display: block; font-weight: 600; }
.swatch .meta .val { font-family: var(--font-mono); color: var(--text-secondary); }
/* ----- Spacing scale ----- */
.space-row { display: flex; align-items: center; gap: var(--space-4); }
.space-row .tag { width: 80px; font-family: var(--font-mono); font-size: 12px; color: var(--text-secondary); }
.space-bar { height: 16px; background: var(--accent); }
/* ----- Elevation ----- */
.elev { padding: var(--space-6); border: var(--border-width) solid var(--border); }
.elev .inner { padding: var(--space-5); }
/* ----- Buttons ----- */
.btn {
font: inherit; font-weight: 600; font-size: 14px; cursor: pointer;
display: inline-flex; align-items: center; gap: var(--space-3);
height: 40px; padding: 0 var(--space-5);
border: var(--border-width) solid transparent; border-radius: var(--radius);
transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn.sm { height: 32px; font-size: 13px; padding: 0 var(--space-4); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--layer-01); }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--layer-01); }
.btn-danger { background: var(--support-error); color: var(--on-status); }
.btn-danger:hover { filter: brightness(0.92); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
/* ----- Fields ----- */
.field { display: flex; flex-direction: column; gap: var(--space-2); max-width: 280px; }
.field label { font-size: 12px; color: var(--text-secondary); }
.input, .select, .textarea {
font: inherit; font-size: 14px; color: var(--text);
background: var(--layer-01); border: var(--border-width) solid var(--border-strong);
border-radius: var(--radius); padding: var(--space-3) var(--space-4);
}
.input::placeholder, .textarea::placeholder { color: var(--text-placeholder); }
.input:focus, .select:focus, .textarea:focus { outline: 2px solid var(--focus); outline-offset: -1px; border-color: var(--accent); }
.textarea { font-family: var(--font-mono); font-size: 13px; min-height: 96px; resize: vertical; }
.search { position: relative; max-width: 280px; }
.search .input { width: 100%; padding-left: 36px; }
.search svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text-secondary); }
/* checkbox / radio / toggle */
.check { display: inline-flex; align-items: center; gap: var(--space-3); cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
.toggle { position: relative; width: 40px; height: 22px; flex: 0 0 40px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .track { position: absolute; inset: 0; background: var(--border-strong); transition: background var(--dur-fast) var(--ease); }
.toggle .knob { position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; background: #fff; transition: transform var(--dur-fast) var(--ease); }
.toggle input:checked + .track { background: var(--accent); }
.toggle input:checked + .track + .knob { transform: translateX(18px); }
.toggle input:focus-visible + .track { outline: 2px solid var(--focus); outline-offset: 2px; }
/* ----- Tags / status ----- */
.tag-pill { display: inline-flex; align-items: center; gap: var(--space-2); font-size: 12px; padding: var(--space-1) var(--space-3); border: var(--border-width) solid var(--border-strong); }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.draft { background: var(--support-warning); }
.dot.published { background: var(--support-success); }
.badge { display: inline-flex; align-items: center; gap: var(--space-2); font-size: 12px; font-weight: 600; padding: var(--space-1) var(--space-3); color: var(--on-status); }
/* ----- Snippet list rows ----- */
.list { border: var(--border-width) solid var(--border); max-width: 320px; }
.item { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border-left: 2px solid transparent; cursor: pointer; }
.item + .item { border-top: var(--border-width) solid var(--border); }
.item:hover { background: var(--layer-01); }
.item.active { background: var(--layer-01); border-left-color: var(--accent); }
.item .main { flex: 1 1 auto; min-width: 0; }
.item .name { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.item .sub { font-size: 11px; color: var(--text-secondary); display: flex; align-items: center; gap: var(--space-2); }
.item .del { opacity: 0; border: none; background: none; color: var(--text-secondary); cursor: pointer; padding: var(--space-1); display: flex; }
.item:hover .del { opacity: 1; }
.item .del:hover { color: var(--support-error); }
/* ----- Panel / card ----- */
.panel { background: var(--layer-01); border: var(--border-width) solid var(--border); padding: var(--space-6); max-width: 320px; }
.panel h4 { margin-bottom: var(--space-4); }
.meta-row { display: flex; justify-content: space-between; font-size: 13px; padding: var(--space-2) 0; }
.meta-row .k { color: var(--text-secondary); }
/* ----- Tabs ----- */
.tabs { display: inline-flex; border-bottom: var(--border-width) solid var(--border); }
.tabs button { font: inherit; font-size: 13px; cursor: pointer; background: none; border: none; color: var(--text-secondary); padding: var(--space-3) var(--space-5); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button[aria-selected='true'] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
/* ----- Toasts ----- */
.toast { display: flex; align-items: center; gap: var(--space-3); background: var(--layer-02); border: var(--border-width) solid var(--border); border-left-width: 3px; padding: var(--space-3) var(--space-5); font-size: 13px; max-width: 360px; }
.toast.info { border-left-color: var(--support-info); }
.toast.success { border-left-color: var(--support-success); }
.toast.warning { border-left-color: var(--support-warning); }
.toast.error { border-left-color: var(--support-error); }
/* ----- Code surface ----- */
.code { background: var(--layer-01); border: var(--border-width) solid var(--border); padding: var(--space-5); font-family: var(--font-mono); font-size: 13px; line-height: 1.6; overflow: auto; white-space: pre; }
/* ----- Motion demo ----- */
.motion-box { width: 56px; height: 56px; background: var(--accent); transition: transform var(--dur-moderate) var(--ease), opacity var(--dur-moderate) var(--ease); }
.motion-stage.go .motion-box { transform: translateX(220px); opacity: 0.4; }
</style>
</head>
<body>
<div class="controls">
<strong>Astrolabe · Visual Specimen</strong>
<div class="group">
<label>Theme</label>
<div class="seg" id="theme">
<button data-theme-val="light" aria-pressed="true">Light</button>
<button data-theme-val="dark" aria-pressed="false">Dark</button>
</div>
</div>
<div class="group">
<label>Accent</label>
<div class="row" id="accent" style="gap: var(--space-3)">
<button class="swatch-btn" data-accent-val="indigo" aria-pressed="true" style="background: #5b54e6" title="Indigo"></button>
<button class="swatch-btn" data-accent-val="teal" aria-pressed="false" style="background: #0f766e" title="Teal"></button>
<button class="swatch-btn" data-accent-val="amber" aria-pressed="false" style="background: #b45309" title="Amber"></button>
<button class="swatch-btn" data-accent-val="rose" aria-pressed="false" style="background: #be123c" title="Rose"></button>
</div>
</div>
<span class="cap">Structure is rigorous · color is free — swap freely.</span>
</div>
<main>
<!-- TYPOGRAPHY -->
<section>
<h2>Typography — IBM Plex</h2>
<div class="type-row"><span class="tag">display 42/300</span><span class="t-display">Astrolabe</span></div>
<div class="type-row"><span class="tag">h1 32/600</span><span class="t-h1">A spec is a snippet</span></div>
<div class="type-row"><span class="tag">h2 24/600</span><span class="t-h2">A spec is a snippet</span></div>
<div class="type-row"><span class="tag">h3 20/600</span><span class="t-h3">A spec is a snippet</span></div>
<div class="type-row"><span class="tag">h4 16/600</span><span class="t-h4">A spec is a snippet</span></div>
<div class="type-row"><span class="tag">body 14/400</span><span class="t-body">The quick brown fox edits a Vega-Lite spec and watches it render.</span></div>
<div class="type-row"><span class="tag">caption 12</span><span class="t-caption">Last modified · Today</span></div>
<div class="type-row"><span class="tag">mono 13</span><span class="t-code">{ "mark": "bar", "encoding": { "x": { "field": "category" } } }</span></div>
</section>
<!-- COLOR -->
<section>
<h2>Color — neutral ramp (borrowed) · accent &amp; status (free / meaning)</h2>
<p class="cap">Neutrals come from the Carbon gray ramp for legibility; the accent and themes are open. Status colors carry meaning only.</p>
<h4 style="margin: var(--space-5) 0 var(--space-4)">Surface roles (current theme)</h4>
<div class="swatches" id="roleSwatches"></div>
<h4 style="margin: var(--space-6) 0 var(--space-4)">Accent &amp; status</h4>
<div class="swatches" id="accentSwatches"></div>
</section>
<!-- SPACING -->
<section>
<h2>Spacing — 8px base unit</h2>
<div class="stack" id="spaceScale"></div>
</section>
<!-- ELEVATION -->
<section>
<h2>Elevation — lightness, not shadow</h2>
<div class="elev" style="background: var(--bg)">
<span class="cap">--bg</span>
<div class="elev inner" style="background: var(--layer-01); margin-top: var(--space-4)">
<span class="cap">--layer-01</span>
<div class="elev inner" style="background: var(--layer-02); margin-top: var(--space-4)">
<span class="cap">--layer-02 (overlays, popovers)</span>
</div>
</div>
</div>
</section>
<!-- BUTTONS -->
<section>
<h2>Buttons — square, 600 weight</h2>
<div class="row">
<button class="btn btn-primary">Create snippet</button>
<button class="btn btn-secondary">Duplicate</button>
<button class="btn btn-ghost">Cancel</button>
<button class="btn btn-danger">Delete</button>
<button class="btn btn-primary" disabled>Disabled</button>
</div>
<div class="row" style="margin-top: var(--space-5)">
<button class="btn btn-primary sm">Compact</button>
<button class="btn btn-secondary sm">Compact</button>
<button class="btn btn-ghost sm">Compact</button>
</div>
<p class="cap" style="margin-top: var(--space-4)">Tab through to see the focus ring (2px accent outline).</p>
</section>
<!-- FIELDS -->
<section>
<h2>Form controls</h2>
<div class="row" style="align-items: flex-start; gap: var(--space-7)">
<div class="field"><label>Snippet name</label><input class="input" value="Quarterly revenue" /></div>
<div class="field"><label>Comment</label><input class="input" placeholder="Add a note…" /></div>
<div class="field">
<label>Sort by</label>
<select class="select"><option>Modified</option><option>Created</option><option>Name</option><option>Size</option></select>
</div>
</div>
<div class="row" style="margin-top: var(--space-5); align-items: flex-start; gap: var(--space-7)">
<div class="field" style="max-width: 360px"><label>Spec (JSON)</label><textarea class="textarea">{
"mark": "bar",
"encoding": { "x": { "field": "category" } }
}</textarea></div>
<div class="stack">
<div class="search">
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><circle cx="11" cy="11" r="7"/><path d="M21 21l-4.3-4.3"/></svg>
<input class="input" placeholder="Search snippets…" />
</div>
<label class="check"><input type="checkbox" checked /> Show only drafts</label>
<label class="check"><input type="radio" name="r" checked /> Inline data</label>
<label class="check"><input type="radio" name="r" /> Dataset reference</label>
<div class="check">
<span class="toggle"><input type="checkbox" checked /><span class="track"></span><span class="knob"></span></span>
<span>Live preview</span>
</div>
</div>
</div>
</section>
<!-- TABS + STATUS -->
<section>
<h2>Tabs · status · tags</h2>
<div class="tabs">
<button aria-selected="true">Draft</button>
<button aria-selected="false">Published</button>
</div>
<div class="row" style="margin-top: var(--space-6)">
<span class="tag-pill"><span class="dot draft"></span> Draft changes</span>
<span class="tag-pill"><span class="dot published"></span> Published</span>
<span class="tag-pill">
<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><ellipse cx="12" cy="6" rx="8" ry="3"/><path d="M4 6v12c0 1.7 3.6 3 8 3s8-1.3 8-3V6"/><path d="M4 12c0 1.7 3.6 3 8 3s8-1.3 8-3"/></svg>
2 datasets
</span>
<span class="tag-pill">imported</span>
</div>
<div class="row" style="margin-top: var(--space-5)">
<span class="badge" style="background: var(--support-success)">Saved</span>
<span class="badge" style="background: var(--support-error)">Error</span>
<span class="badge" style="background: var(--support-warning); color: #161616">82% full</span>
<span class="badge" style="background: var(--support-info)">Info</span>
</div>
</section>
<!-- LIST + PANEL -->
<section>
<h2>Snippet library &amp; metadata panel</h2>
<div class="row" style="align-items: flex-start; gap: var(--space-7)">
<div class="list">
<div class="item active">
<div class="main">
<div class="name">Quarterly revenue</div>
<div class="sub"><span class="dot draft"></span> Today · 2 KB</div>
</div>
<button class="del" title="Delete"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><path d="M5 7h14M9 7V5h6v2M7 7l1 12h8l1-12"/></svg></button>
</div>
<div class="item">
<div class="main">
<div class="name">Population by region</div>
<div class="sub"><span class="dot published"></span> Yesterday</div>
</div>
<button class="del" title="Delete"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><path d="M5 7h14M9 7V5h6v2M7 7l1 12h8l1-12"/></svg></button>
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<div class="item">
<div class="main">
<div class="name">Scatter · height vs weight</div>
<div class="sub"><span class="dot published"></span> 3d ago</div>
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<button class="del" title="Delete"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><path d="M5 7h14M9 7V5h6v2M7 7l1 12h8l1-12"/></svg></button>
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</div>
<div class="panel">
<h4>Quarterly revenue</h4>
<div class="meta-row"><span class="k">Created</span><span>2026-06-01</span></div>
<div class="meta-row"><span class="k">Modified</span><span>Today 14:30</span></div>
<div class="meta-row"><span class="k">Status</span><span><span class="dot draft"></span> Draft changes</span></div>
<div class="row" style="margin-top: var(--space-5)">
<button class="btn btn-primary sm">Publish</button>
<button class="btn btn-ghost sm">Revert</button>
</div>
</div>
</div>
</section>
<!-- TOASTS -->
<section>
<h2>Toasts</h2>
<div class="stack" style="max-width: 360px">
<div class="toast info">Snippet duplicated.</div>
<div class="toast success">Published “Quarterly revenue”.</div>
<div class="toast warning">Snippet storage is 82% full.</div>
<div class="toast error">Could not save — storage is full.</div>
</div>
</section>
<!-- CODE -->
<section>
<h2>Code / editor surface — IBM Plex Mono</h2>
<div class="code">{
"$schema": "https://vega.github.io/schema/vega-lite/v6.json",
"data": { "values": [{ "category": "A", "value": 28 }] },
"mark": "bar",
"encoding": {
"x": { "field": "category", "type": "nominal" },
"y": { "field": "value", "type": "quantitative" }
}
}</div>
</section>
<!-- MOTION -->
<section>
<h2>Motion — productive only (150ms, restrained)</h2>
<div class="motion-stage" id="motionStage">
<div class="motion-box"></div>
</div>
<div class="row" style="margin-top: var(--space-5)">
<button class="btn btn-secondary sm" id="motionBtn">Play transition</button>
<span class="cap">Neutralized automatically under <code>prefers-reduced-motion</code>.</span>
</div>
</section>
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